Improvement in printing-telegraphs



R. J'. SHEEHY.

PRINTING TELEGRAPH.

0.179,875. Patented July 18, 1875.

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NPEIERS, FRQTO-LJTHIGRAPHER, WASHINGTON, D. C.

UNITED STATES PATENT f EEIeE.

ROBERT J. SHEEHY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN PRINTING-TELEGRAPHS.

Specification forming part of Letters Patent No. [79.875, dated July 18, 1876; application filed February 7, 1876.

T0 all whom it may concern:

Be it known that I, ROBERT J. SHEEHY, of Boston, 'of the county of Suffolk and State of Massachusetts, have invented a new and useful. or an Improved Telegraphic Printing-Instru ment; and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawings,of which- Figure l is a top view, Fig. 2 a front elevation, Fig. 3 a rear elevation, and Figs. 4^

bination ot' a dial and index-pointer, and' mechanism for operating the latter, with the `type-wheel and its operative shaft, all being substantially as hereinafter explained, and as represented in the drawings.

In this instrument two electro-magnets, A andY B, are employed, they being arranged as shown, and having between their pairs of poles two armatures, C and D. The outer armature, O, is attached to a vertical shaft, a., by two arms, b b, extended therefrom, such shaft being pivoted in a base-plate, E, and also in a standard, F, erected on said plate, as shown. 0n the shaft a is a rotary sleeve, o, from which an arm, d, projects, and has xed to it the armature D. From the said sleeve there is extended an escapementarm, Gr, that operates with an cscapement-wheel, e. (See Fig. 6, which is a transverse section of the instrument, taken through the type- Wheel; see, also, Fig. 7, which is a top view of said arm G and wheel e.) The wheel e is fixed on a vertical arbor, f, which carries a type-wheel, g, having upon its periphery a series of types or devices for printing alphabetic characters. From the shaft a there extends along arm, H, having pivoted to it two pawls, h t', to work with a ratchet-wheel, k, fixed on a feed-drum, l, between which and a pressureroller, k2, arranged as shown, the strip ot' paper to be printed passes or is to be passed.

The roller k2 is mounted in a vibratory arm,

l1, provided with a spring, m, for moving it, so as to force the roller k2 toward .the drum. To the pawls there are springs, m1 n, for keeping them up to their ratchet-wheel. During each forward or backward movement of the arm H the drum will be revolved a short distance, in order to feed the strip of paper forward for being printed. The strip (shown at I) passes across a roller, o, and through two guides,'p p, carried by an auxiliary arm, q, projecting, yas shown, from abent lever or arm, K, whose fulcrum or pivot is shown at r. A helical spring, s, fixed at one end to a post, t, and fastened at its other end to the auxiliary arm q, serves to move the arm K in a manner to draw the paper olf the type-wheel. The said arm K rests on a short vibratory lever, L, which, at its middle, is pivoted on the post t, such lever L being provided with two studs, u fu, extended upfrom its two arms and against the outer edge of the arm K. To one of the arms of the lever L, and also to the arm H, there is pivoted a connection-bar, M, all being' as shown. An inking-roller, N, supported on a vihratory arm, O, rests against the typewheel, and is forced up to it by a spring, W,

properly applied to the said arm O. Beneath the escapement-arm G is a switch or lever, P, whose pivot, w, extends up from an insulator, y, xed on the base-plate. Fig. 8 is a top View of the said metallic switch and the metallic abutments with which it operates. The shorty er arm of the switch is forked, and receives between the prongs a stud, z, that extends downward from the escapement lever or arm G. The longer arm of the switch is arranged between the two abutments a' b', which are, or should be, insulated from each other and the base-plate. A wire, c', connected to the front abutment, leads to the coil of the rear magnet, While another wire, d', leads from the rear abutment to the coil of the front magnet, and the coils ot both magnets are connected by a wire, e. The telegraph-Wiref, from the pole of the battery, is connected to the wire e at its middle. Another wire, g', leads from the switch, near its fulcrum, to the line-wire.

We will now suppose the switch to be in :ontact with the front abutment a', and also hat the lesser armature D is drawn toward he ou ter magnet A. The electric current then vill pass through the coils ot' the rear magnet o the i'ront abutment; thence through the witch and to the line-wire, in which case the ear magnet will draw toward it the said aruature D, and thus move the escapement-arm lr and cause it to actuate or partially 'revolve he type-wheel. During the said movement. `t' the arm G, orjust previous to its comple` ion, the switch will be movedA over to the oposite or rearabutment, thus breaking the ircnit through the rear magnet-coils and comloting it through those of the front magnet, vhereby the armature'will be moved in the pposite direction, and the escapement-arm lso will be again moved to eii'ect a further lovement of the type-wheel, such movements t' the type-wheel being regulated by the ciruit-breaker at that end of the line from which he message is transmitted.

In order to cause the printing ot' the strip t' paper to take place, and such strip to be 'ed along as may be required., the other or `uter armature, C, will be operated or moved r attracted tirst by one magnet and next by he other at suitable times. This armature C sprevented by the spring S from moving with he inner armature, the power of such spring eing sufficient to counterbalance the attractve force ot' either magnet while it may be peratin g the inner armature.

To eii'ect the movements ofthe outer arma-- ure, additional battery-power maybe used at he proper times, or a resistance-coil may be ,vailed ot', whereby the force of the electric urrent at suitable periods may be diminished ufliciently to effect the working of the inner frmature.

The arm H,-vibrated by the outer arma-ture, vill operate the pawls IL t', whereby the feedng ot' the strip ot paper will be eected. By ueans ot' the connection-bar M, the vibratory ever L, its studs u fu, and the spring s, the ever or arm K will be vibrated, so as to cause he strip ot' paper to be pressed up against .nd drawn away from the type-wheel at the roper times.

B and S are two helical springs, one beng attached to the escapement-arm G and he other to the arm H. Each spring has its ear end attached to a cord fixed to or extended rom one of two rotary windlass-pins, h i', aranged in a standard, k. By either of such vindlass-pins the draft of its spring on the rm may be relieved or applied as may be remired.

The object of the spring R, attached to the arm G, is to enable me to operate the arm hy such spring and one otl the' magnets, in case I may desire to do this'at any time. So with the other spring, S, by means ot' it and one of the magnets, the arm H may be operated.

In order to regulate the strength of the impression ot' vthe type-wheel I make use of an adjusting stop or screw, Z2, which screws through apost or standard, m2. When the arm H is moved forward it brings up against the endof the screw, which serves as a stop to arrest it. A checknut, u', on the screw answers to confine it in position. Furthermore, on the top of the spindle or arbor of the type-wheel is a beveled gear, o', that engages with another bevel-gear, p', iXed on an inclined arbor, q', arranged as shown, and provided with an index-pointer, r. Concentrically with the arbor q is a stationary dial, s', having letters or characters on it corresponding to those made by the type-wheel. When any type ot' the said wheel is in the act of printing, or the wheel is stopped for it to print the strip of paper, the index-pointer r will point to the dial-letter corresponding to the said type.

By means of the dial and index-pointer a'n attendant can readily read a message being printed, or can receive one without the necessity ot' printing it.

In the above-described telegraphic printinginstrument, I claim as my invention`as fol lows, viz:

l. I'he combination of twoelectro-magnets, A B, two armatures, G D, the switch P, the abutments a b', and mechanisms, substantially as described, for revolving the typewheel g, feeding the strip I of paper, and moving it up to and away from the said typewheel, these latter mechanisms being the escapement-wheel e and arm Gr, the arm H, its pawls h t', springs m1 n, ratchet-wheel Vlc, feeddrum l, presser-wheel k2, bent lever K, rockerlever L, studs u c, connection M, and spring s, all applied and arranged essentially as specicd.

2. The combination of the escapement-whecl e and armature-lever G, provided with the stud z, with the switch-lever l? and its abutments a b', arranged as set forth, and connected, as described, with the two magnets A B.

ROBERT J. SHEEHY.

Witnesses:

R. H. EDDY, J. R. SNOW. 

